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Livelist logic should handle dedup blkptrs

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Update the logic to handle the dedup-case of consecutive
FREEs in the livelist code. The logic still ensures that
all the FREE entries are matched up with a respective
ALLOC by keeping a refcount for each FREE blkptr that we
encounter and ensuring that this refcount gets to zero
by the time we are done processing the livelist.

zdb -y no longer panics when encountering double frees

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Don Brady <don.brady@delphix.com>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #11480
Closes #12177
This commit is contained in:
Serapheim Dimitropoulos
2021-06-07 12:09:07 -07:00
committed by Tony Hutter
parent 6b9d0eda75
commit abd0b59e48
4 changed files with 210 additions and 64 deletions
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tests/runfiles/common.run
+2 -2
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@@ -165,8 +165,8 @@ tags = ['functional', 'cli_root', 'zfs_create']
[tests/functional/cli_root/zfs_destroy]
tests = ['zfs_clone_livelist_condense_and_disable',
'zfs_clone_livelist_condense_races', 'zfs_destroy_001_pos',
'zfs_destroy_002_pos', 'zfs_destroy_003_pos',
'zfs_clone_livelist_condense_races', 'zfs_clone_livelist_dedup',
'zfs_destroy_001_pos', 'zfs_destroy_002_pos', 'zfs_destroy_003_pos',
'zfs_destroy_004_pos', 'zfs_destroy_005_neg', 'zfs_destroy_006_neg',
'zfs_destroy_007_neg', 'zfs_destroy_008_pos', 'zfs_destroy_009_pos',
'zfs_destroy_010_pos', 'zfs_destroy_011_pos', 'zfs_destroy_012_pos',